Intraoperative Ultrasound - This article reviews the most popular applications for intraoperative ultrasound imaging, including neurosurgical applications in the brain and spinal cord, and abdominal applications in the gallbladder, biliary tract, liver, and pancreas. A brief description of other applications and innovative uses of intraoperative ultrasound is included, and interventional techniques for biopsies, drainages, and approaches to tumor ablation are discussed. Descriptions of the equipment used, optimal scanning approaches, and the logistical approaches to efficient ultrasonography are emphasized./